Rock Lobster, is there any stats to back up your claim about holding on penalties? I'm genuinely interested, if that is really the case.
From my armchair perspective, it seems there are less penalties for holding on because more defending players aren't winning them because they are simply off their feet, whereas in the past guys would win a penalty for example when they appeared to have a knee on the ground (eg George Smith) or were bridging over a team mate (ala McCaw).
Pocock hasn't been out of the game that long. I think he adapted when there was the last significant change to the variations and if he has to make a minor adjustment (that's really what it will take) then I think he will easily be up to it.